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產品描述
由自然本身提供一種可再生的骨干了不起的聚合物。
伊士曼™醋酸丁酸纖維素（CAB-500-5）是一種纖維素酯具有高丁酰基含量，低羥基含量和中等的ASTM（A）的粘度。 CAB-500-5提供了廣泛的溶解性和相容性。它是耐非極性脂肪族和芳香族烴。它產生一個相對較軟的，柔性膜需要很少或沒有增塑劑在許多應用中。伊士曼™CAB-500-5被提供作為干，白色自由流動的粉末方便處理。伊士曼™纖維素酯是基于高達60％的纖維素，豐富的天然可再生資源之一。
物性表：| Property | Typical Value, Units | |||
| Butyryl Content | 51 wt % | |||
| Acetyl Content | 4 wt % | |||
| Hydroxyl Content | 1% | |||
| Viscosity a | 19 poise | |||
| Color b | 125 ppm | |||
| Haze b | 25 ppm | |||
| Acidity as Acetic Acid | 0.03 wt % | |||
| Ash Content | 0.05% | |||
| Refractive Index | 1.475 | |||
| Heat Test @ 160°C for 8 hr | Tan melt | |||
| Melting Point | 165-175°C | |||
| Specific Gravity | 1.18 | |||
| Wt/Vol (Cast Film) | 1.18 kg/L (9.83 lb/gal) | |||
| Bulk Density | ||||
|
400 kg/m3 (25 lb/ft3 ) | |||
|
512 kg/m3 (32 lb/ft3 ) | |||
| Dielectric Strength | 787-984 kv/cm (2-2.5 kv/mil) | |||
| Glass Transition Temperature (Tg) | 96°C | |||
| Molecular Weight c Mn | 57000 | |||
| Tukon Hardness | 14 Knoops | |||
| a Viscosity determined by ASTM Method D 1343. Results converted to poises (ASTM Method D 1343) using the solution density for Formula A as stated in ASTM Method D 817 (20% Cellulose ester, 72% acetone, 8% ethyl alcohol). b Determination of color made on a solution of the ester dissolved in MIBK using Pt-Co color standards. Haze is based on scattered light from a monodispersed polystyrene latex suspension haze standard. c Polystyrene equivalent number average molecular weight determined by gel permeation chromatography. |
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